Gas brazing apparatus.



No. 642,605. Patented Feb. 6, I900.

E. HAHN.

GAS BRAZING' APPARATUS.

(Application filed June 18, 1897.)

(No Model.)

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NITE STATES PATENT OFFICE.

EDWARD HAHN, OF BUFFALO, NEW YORK, ASSIGNOR TO GEORGE S. PEARSE, .L. GERTRUDE ANGELL, AND ARTHUR M. SUMNER, OF SAME PLACE.

GAS BRAZING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 642,605, dated February 6, 1900.

Application filed June 18, 1897.

To (LZZ whom it may concern:

Be it known that I, EDWARD HAHN, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Gas Brazing Apparatus, of which the following is a specification.

My invention relates to an improved gasburner for brazing-furnaces; and the object of the invention is to provide a simple, cheap, and effective gas-burner having a longitudinally-adjustable mixing device within its body for thoroughly mixing the air and gas and also regulating the intensity of the heat.

It further relates to certain details of construction, all of which will be fully and clearly hereinafter described and claimed, reference being had to the accompanying drawings, in which Figure 1 represents an enlarged side elevation of the gas-burner, a portion being in section to show the interior construction. Fig. 2 represents a transverse section on or about line a a, Fig. 1. Fig. 3 represents a transverse section on or about line a c, Fig. 1. Fig. 4 represents a side elevation of a forge or brazing-furnace with which the burner is used, showing also the-gas-burner and the movable jointed pipes by which it is connected with the gas and air supply pipes. Fig. 5 represents a top or plan view of the movable jointed pipes for carrying gas and air to the burner.

Referring to the drawings for the details of construction, in which like numerals represent like parts, 1 represents the supportingstand; 2, the brazing-forge, which is preferably constructed of bricks.

The burner consists of the hollow cylindrical portion 3, the nozzle 4, which is preferably constructed with a reduced mouth portion 5, and a screw-threaded portion 6, which is adapted to screw upon one of the screwthreaded ends of the cylindrical portion 3. Upon the opposite screw-threaded end of the portion 3 is fitted a hollow case 7, provided with a stuffing-box S.

The mixing chamber or device comprises the perforated end plates or screens 9 and 10, screwed upon the end of a tubular portion 11,

which is also provided with a series of perfo- Serial No. 641,306. (No model.)

rations and two or more portions 12, of wiregauze, interposed between the screens or end plates 9 and 10 to more thoroughly mix the air and gas.

A shaft 13 13, one end of which screws into or is otherwise detach-ably secured to the mixing-chamber, passes through the stuffing-box 8 and is provided at its outer end with a handle or hand-wheel 14.

The purpose of the shaft and handle is to adjust the mixing-chamber Within the cylindrical portion 3 of the burner, the end plates 9 and 10 of the said mixing-chamber fitting closely within the said cylindrical portion 3, and thus regulate the distance between the mouth 5 of the nozzle, and thereby regulate the degree of the intensity of the heat. When the mixing device or chamber is drawn away from the nozzle, the flame is drawn within the burner, the supply of air is decreased, and the intensity of the heat is diminished, and as the mixing device is adjusted toward the nozzle the flame is brought nearer the airsurrounding the nozzle, increasing the supply of air and augmenting the intensity of the heat. It has been found advisable in order to produce the best results to have a higher pressure upon the air.

It will be noticed that the discharge-openings converge toward the center of the axis of the tubular portion. The object of this is to provide means for concentrating the heat at one point and also prevent the intense heat from being thrown upon the sides of the nozzle, it having been found by experience that openings running parallel with the longitudinal direction of the burner would burn and destroy the nozzle within a short time.

The most intense point in the flame is believed to be at the meeting-point of the gasstreams flowing from the converging discharge-openings, and by adjusting the mixing device the position of the meeting-point is regulated.

In order to provide for adjusting the burner to point the nozzle in different directions, I place aseries of jointed pi pe-sections between the gas-supply pipe and the burner.

I designate the sections by the numerals 15, 16, 17, and 18, each of which is jointed to its respective neighbors by the elbows 19 2O 21 22. One of the sections is constructed in two separable divisions. A coupling 23 is used to unite them, so that the burner, with a portion of the jointed sections, can be easily detached from the remainder of the sections and the supply-pipe. Another section is also constructed in separable portions, which are united to each other by a T-coupling 24, into the stem of which the end of the air-supply pipe 25 is secured.

The air-supply pipe can be connected with any well-known pumping device, if desired, to supply the air under pressure.

Regulating devices or stop-cocks 26 and 27 are provided in respectively the gas-pipe and the air-pipe to regulate and control the vol ume of gas and air admitted.

To operate the device, the handle or handwheel is pushed down, bringing the mixingchamber as near as possible to the nozzle. The gas and air are then turned on and a match applied. The intensity of the heat is then regulated by adjusting the mixing-chamber within the burner by means of the shaft and hand-wheel and regulating the supply of gas and air by means of the regulating devices 26 and 27, the burner being adjusted to any angle required by turning the pipe-sections.

It is obvious that my invention can be utilized for many other purposes where a burner provided with means for regulating the intensity of the heat is required.

I claim as my invention-- 1. A "as-burner com )risin a hollow and gas supply, a nozzle, a longitudinally-ad justable mixing device contained within said body and between the air and gas connection and the nozzle and having means for partially retarding the passage of the air and gas and thereby thoroughly mixing ,the same before its ignition.

2. A gas-burner comprising a hollow tubular body portion provided with a nozzle at one end and a stuffing-box at the other, a mixing device having perforated end plates, supplemen tary wire-gauze portions and a perforated tubular portion, and a longitudinal shaft passing through the stuffing-box and longitudinally through the tubular burner-body portion and connected at one end to the mixing-chamber, and a handle at the opposite end of the shaft, as set forth.

3. A gas-burner comprising a hollow tubular body portion and a mixing device having a perforated tubular portion, and an end plate or screen provided with openingswhich converge toward the center of the axis of the perforated tubular portion, as set forth.

4. A gas-burner comprising atubular body provided with a mixing device having perforated plates, and a shaft passing through the tubular burner-body and connected at one end to the mixing-chamber, and having an operating-handle at the opposite end for l0ngitudinally adjusting the mixing device in the body, as set forth.

EDWARD HAHN. XV itnesses:

JAMES SANGSTER, G. A. NEUBAUER. 

